On Wed, Aug 12, 2015 at 11:54 AM, Alia Atlas <[email protected]> wrote:
> ECMP is critical in the datacenter and backbone because those networks are
>> designed to provide the E ("equal") in ECMP. Because the links are equal,
>> it's easy to load-balance over them without needing to do complicated stuff
>> like traffic engineering - you just treat an N-way ECMP bundle as a link N
>> times bigger, and hash across it. That does not happen in home networks,
>> which are more grown than designed.
>>
>
> ECMP applies beyond link bundles. Of course, equal-cost can be hard to do
> - and one can safely use downstream paths. The relevant question is
> whether traffic is expected to be able to take multiple paths to allow
> load-balancing.
>
Yes, ECMP applies beyond bundles, but unless your metrics are very
simplistic, you won't actually encounter equal-cost paths unless you design
the network with ECMP in mind. So you'd need non-equal cost multipath for
multipath to be useful in a homenet.
_______________________________________________
homenet mailing list
[email protected]
https://www.ietf.org/mailman/listinfo/homenet
